The most privileged and pampered dogs in the world are here in New York this week competing in the fancy Westminster dog show. But one of the dogs has a very different story he was neglected and mistreated sold on Craigslist. Until his new owner found him locked him and turned him into a trial. Here's ABC's Dan Harris with the story of an effort. In a competition where purebred dogs are rates include Graham -- blown dried way their hand -- -- -- diapers and bow ties and followed around with saliva Zamboni. I am like dodging rule. -- a minute video game. This orgy of canine entitlement that is done named maverick he is an exception. Seems to be just incredible that here we are the Super Bowl underdogs and this -- the dog who found on Craigslist overall skills and you have -- -- -- terrible -- -- was so thing you could see his ribs his nose was infected and he chewed his own tail -- But -- stallings. Nurse never -- back to health and their bond is now palpable acts they were in this room full of people it's like you're the only one you know Abraham. It is going to. It's five months after rescuing that relate you know level not a dance spelling started entering these shows and neck -- -- -- Really -- here. The big dog the dog shoots. Westminster but he wins today -- you fail. I think we're about to protect. I would -- tell -- -- so happy foreign. As maverick and his trainer paraded before the judge stallings and I watched together and I. In the end though the judge picked another done. Afterwards stallings said he wasn't disappointed that maverick had in -- -- already -- The has -- bull. -- told yeah. Good maverick he said -- -- from forgotten. To unforgettable. Dean Harris ABC news New York.

This transcript has been automatically generated and may not be 100% accurate.

Westminster Kennel Club Dog Show Reveals New Breeds

David Frei announces six new breeds to earn the right to compete in dog show.